Carbureter.



H. ESMITH.

. CARBURETERr APPLICATION FILED JUNE 13' 15 151 A.

' Pmmmd M11230, 1918.-

2 SHEETS-SHEET l- H. -E. SMITH. CARBURETER. APPLICATION FILED JUNE 18. 1914..

Patented Apr. 30., 1918.

2 SHEETS-SHEET 2- W &5 W w W Hunter ELWELL SMITH, OF ATTADALE, BUSH HULL PARK, ENGLAND.

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Epeeificationof Letters Patent.

Patented Apr, 36', little Application filed June 18, 19M. Serial No. 845,861.

To all whom it may concern.

Be it known that Lliemurr E a subject of the King of Great Britain, residinpf at Attadale, Bush Hill Park, MiddleseX, England, have invented new and useful Improvements in and Connected with. (Jarbureters, of which the following is a specification.

This invention relates to carbureting apparatus,especially of the kind employed to produce a mixture of petrol vapor and air. usually known as petrol gas for lightinp and heating-purposes.

The present invention consists in the combination. of two or more sets of sloping plate carbureters for the purpose of treating the residue part of the petrol, which is the more difiicult to deal with, by exposing; it to the uncooled air which is capable of producing the greater amount of action upon it. Each carburetor comprises fiat sloping surfaces such as plates, over which the hydrocarbon trickles. Theinv'ention provides a draining device at the bottom of each carburete1-,from which the petrol residue can drain into a false bottom, from which it may be removed.

The invention is illustrated in the vaccompanying drawings, in which Figure 1 shows a double sloping plate carbureter, while i Figs. 2 and 3 show in sectional elevation v and. plan respectively of a modified form ot' earbureter.

. Fig. 4. shows a slight modification oi. the arrangement shown in Figs. and 3.

As shown in Fig. 1, there are two tanks. the residue tank 1 and the tank for petrol of ordinary specific gravity 2. The tank 1 is made much smaller than the tank 2 on account of the relatively small amount of rose,

due. This is etl'ected by making them of different depths at-rig'ht angles to the plane of the drawing. There are two carburetor chambers illustrated, 3 and l, the carburetor chamber for the residue 3, being supplied with the warmest air, that. is, air which as yet has not been cooled by any evaporation,

through a pipe 5, which air after passing" down the plates of carburetor through con-.

nection'ti and up the plates of carburetor 4 escapes through the outlet pipe '7. The car bureters shown consisting of plates 8 and 9,

which are arranged in a zigzag manner and have a gradually decreasing slope toward LWELL S M .rrrr,

other hydrocarbon is supplied preferably by a device insuring its supply proportional to that of the air; for example, by a spoon teed driven. from the air-pump to a lit-shaped trough 10 or 11 to the uppermost plate 8 or 9, and battles l2 and 13 are employed for preventing the disturbance of the petrol in the trough. The petrol is thus supplied to the plates in very thin streams and spreads over the surface of the plates, passing right to the bottom of the apparatus without actually leaving them. in order to confine the air to the surface of the plates means are provided shown as battles It and 15.

its illustrated spoon feeds l6 and 1? for the residue and petrol respectively are shown actuated from a single spindle 18. The residue and normal petrol are supplied through pipes 19 and :20 to their respective rarbu-- reters. it the bottom of each carluueter a sloping plate 221 and 2:2 is'arrangcil and the petrol is prevented from passingthrough the air coimectinp pipe by the projecting ends 23 and 2%. It drains down the plates 21 and 22 and passes through drip-opeuin 1js 25 and 26 into false bottoms 27 and 28 from which the residue may be drawn in order to return it to the tank 1.

.rs aliove mentioned, it there is not sutlicicnt refuse to supply the tank 1 2. small quantity of petrol of normal specific p'rarity may be added to supplement it in that tank.

The fresh air as yet uncooled by any evap oration of petrol and as yet containing no petrol vapor is passed through the crnrhu-- retcr to which the residue is supplied. This residue has a less vapor tensionthanthborigtion to the air than the petrol in the main carbureter. The air passing from the reel.

due carlmreter, although incapable of vaporiziug any more residue then operates upon. the petrol of ordinary specific ravity wh ch it can evaporate-becauso this petrol is more volatile.

lfn the construction shown in Figs. 2 and 3 a slightly different type of carburetor is employed. Slopiugr plates are arranged to form flat zigzag tubesfor the passage ot the air and petrol. in this case the residue tank 29 is shown arranged behind the ordinary llOtl jpetrol tank 30. The warm air after passing i'through apurifier 31 passes as in the arrangement shown in Fig. 1, into carbureter 32 in which the residue is vaporized and then. passes through the bottom pipe 33 into carburetor 31 for the ordinary petrol, and the vapor passes out by outlet pipe 35. In this apparatus there are two supply pipes, 36 for the residue and 37 for the petrol of normal specific gravity, the carbureter being supplied with an air rent 38. In this arrangement the two spoon feeds are actually arranged upon the same spindle 39. False bottoms 40 and 4:1 are employed as before with drip holes 4:2 and 13.

Fig. at shows a modification of Figs. 2 and 3 with the tank arrangen'i'ents removed. In this case there are two carbureters for the petrol of normal specific gravity, namely, 4e and i5, but only a single one 16 for the residue. The warm air therefore passes in through the inlet pipe e7 to the residue carbureter 46, through the pipe 48 to carburetor 44, through pipe 49 to carbureter 45, and so out through outlet 50. There is one supply tube 51 for the residue and two supply pipes 52 and 53 for the petrol of normal specific gravity, and an air vent 54. Each carbureter has a false bottom 55, 56 and 57 and it) there are drip openings 58, 59 and 60 for the residue. The devices shown in Figs. 2 and 4 otherwise operate in entirely the same Way as that showh in Fig. 1.

In some cases it is found that an amount :5 of residue about 10% of the amount 01 petrol used remains over, but in some cases the amount of the residue may amount to about 17%. Obviously then, the tanks and the rest of the apparatus must be .designed to allow for rather more than 17% of residue, say roughly By all these arrangements according to the present invention, the maximum quantity of heat maybe obtained from any given volume of petrol, because the residue finally left over, if any, is very small indeed, and in this way an extremely efficient lighting plant may be constructed.

\Vhat 1 claim is:

1. A. carbureting apparatus comprisinga casing provided with :1 plurality of chan1- bcrs or compartmcnts each having an inner wall or side consisting of inclined surfaces arranged continuously in zigzag manner, an air inlet at the upper end of the first chamber, said first chamber being connected by a. channel with a second chamber at their lower ends, separate means for introducing h 'drocarb0n liuid into the chambers and directing it upon the uppermost inclined surface, and an outlet from the upper end of the second chamber, whereby the air is caused to pass dowmvardly over the inclined surfaces in the first chamber and then upwardly over the inclined surfaces in the second chan'ibcr.

2. carburcting apparatus, comprising a. casing provided with a plurality of chambers or compartments each having an inner wall or side having inclined surfaces arranged conlinuousl) in substantially zigzagmanncr. forming alternate upwardly facing and downwardly facing portions, the inclination of said surfaces from the horizontal decreas ing from the top downwardly, ballics cooperating with said downwardly facing portions and arranged substantially parallel therewith to Form confined passages, means for introducing hydrocarbon fluid into the upper ends of said chambers and directing it upon the uppcrn'iost inclined surface, an air inlet at the upper end of the first chamher. and an outlet from the last chamber, adjacent chambers being connected by channcl.-- arranged alternately at the opposite ends, whereby the air is caused to pass successively over the zigzag surfaces and in opposilc directions in adjacent chambers.

li. testimony whereof I sign my name to this specification in the presence of two subscribing witnesses.

H. ELWELL SMITH.

W itncsses:

ll. \V. K. Jnxxmes, R. M. Hocnns.

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